He has said it would be a "terrible mistake" to ignore the issues behind Trump's victory and the Brexit vote, adding: "We are living in a world of widening, not diminishing, financial inequality, in which many people can see not just their standard of living, but their ability to earn a living at all, disappearing.

"It is no wonder then that they are searching for a new deal, which Trump and Brexit might have appeared to represent."

He also warned that mankind was "at the most dangerous moment in the development of humanity" with the "technology to destroy the planet."